What is your definition?
I think he did a nice job of explaining the developmental biology/genetics component, but he could have perhaps tied it in better to the evolutionary part instead of wasting time babbling about the word "Evo-Devo."
I don't know what that guy is babbling about either.
Devo has obviously hired a new lead singer for their band.
Someone we know? Nah! Devo is all-male.
Separate names with a comma.